block: move blk_drop_partitions to blk.h

No need to have this declaration in a public header.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220124093913.742411-3-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk.h

@@ -426,6 +426,7 @@ int bdev_add_partition(struct gendisk *disk, int partno, sector_t start,
 int bdev_del_partition(struct gendisk *disk, int partno);
 int bdev_resize_partition(struct gendisk *disk, int partno, sector_t start,
 		sector_t length);
+void blk_drop_partitions(struct gendisk *disk);
 
 int bio_add_hw_page(struct request_queue *q, struct bio *bio,
 		struct page *page, unsigned int len, unsigned int offset,

include/linux/genhd.h

@@ -219,7 +219,6 @@ static inline u64 sb_bdev_nr_blocks(struct super_block *sb)
 }
 
 int bdev_disk_changed(struct gendisk *disk, bool invalidate);
-void blk_drop_partitions(struct gendisk *disk);
 
 struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id,
 		struct lock_class_key *lkclass);